81406540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{239431}}^1$

素因数の和:239457

約数の個数: 24

約数和(自身を含む): 181010592

約数和(自身を除く): 99604052

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 239431, 478862, 957724, 1197155, 2394310, 4070327, 4788620, 8140654, 16281308, 20351635, 40703270, 81406540]

約数ペア:

[(1, 81406540), (2, 40703270), (4, 20351635), (5, 16281308), (10, 8140654), (17, 4788620), (20, 4070327), (34, 2394310), (68, 1197155), (85, 957724), (170, 478862), (340, 239431)]